Dν≠｛x ｜(a) For every irrational number x with bounded elements in its continued fraction expansion, fν is differentiable at x.｝ じゃないんだ！（＾＾ ↓ Dν≠｛x ｜(a) For every irrational number x with bounded elements in its continued fraction expansion, fν is differentiable at x.｝ なんだ！（＾＾
R - Dν≠｛x ｜(b) There exist infinitely many irrational numbers x such that fν is not differentiable at x ｝ でもないんだ・・、多分（＾＾ ↓ R - Dν≠｛x ｜(b) There exist infinitely many irrational numbers x such that fν is not differentiable at x ｝ なんだ・・、多分（＾＾
